|Pos.|City|Population (ab)|Surface (km²)|Density (ab/km²)|Altitude (mslm)|
|---|---|---|---|---|---|
|1st|Bergamo|121.316|39,6|3064|249|
|2nd|Treviglio|29.334|31,54|930|125|
|3rd|Seriate|25.036|12,41|2017|247|
|4th|Dalmine|23.237|11,6|2003|207|
|5th|Romano di Lombardia|19.472|18,03|1080|120|
|6th|Albino|18.232|31,32|582|342|
|7th|Caravaggio|16.258|32,81|496|111|
|8th|Alzano Lombardo|13.821|13,43|1029|304|
|9th|Stezzano|12.999|9,25|1405|211|
|10th|Osio Sotto|12.083|7,45|1622|182|

Question: how many cities appear on this chart?
Answer: 10